与 «RIGHT-ANGLED»相关的英语书籍
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1
From Riches to Raags: 3-manifolds, Right-angled Artin ...
This book presents an introduction to the geometric group theory associated with nonpositively curved cube complexes.
2
Assignments in Junior Measurement: Trigonometry and ...
... 13 Mixed problems (right-angled triangles) 28 14 Angles of elevation and
depression 30 15 Further problems (right-angled triangles) _ 32 16 Review A:
Trigonometry (right-angled triangles) 34 17 Ratios of angles (degrees & minutes;
sine, ...
3
Right-
angled Coxeter Groups and CAT(0) Spaces
The group Wlk(i) will play an important part in our study of right-angled Coxeter
pairings. We call this group the link group of si . We also use the notation c(i) := lk
(i) ∪ {i} (this is known as the graph theoretical star of a vertex) and kl(i) for the set
...
Mark Richard O'Brien,
2008
4
Elementary Geometry in Hyperbolic Space
1 Right-angled hexagons and pentagons The configuration to be studied is a
cyclically ordered 6-tuplet of lines Sn, n mod 6, oriented if proper, such that for
every n mod 6 the lines Sn and Sn+l are normal to each other, but not the same ...
5
Diophantus of Alexandria: A Study in the History of Greek ...
THEOREMS AND PROBLEMS ON RATIONAL RIGHT-ANGLED TRIANGLES. i.
On No. 20 of the problems about right-angled triangles added by Bachet to Book
vi. ("To find a right-angled triangle such that its area is equal to a given number")
...
Sir Thomas Little Heath,
2012
6
Mathematics and Its History
After the discovery of rational right-angled triangles, and their complete
description by Euclid (Section 1.2), a question one might expect to arise is, what
about rational triangles in general? Of course, any three rational numbers can
serve as ...
7
Cities of the World: World Regional Urban Development
The Spanish- American city adopted the distinctive feature of a right-angled
gridiron of streets oriented around a central plaza. The imposed urban form of the
Laws of the Indies towns essentially served as an effective instrument of social ...
Stanley D. Brunn, Maureen Hays-Mitchell, Donald J. Zeigler,
2008
8
God Created the Integers: The Mathematical Breakthroughs ...
To find three right-angled triangles (i.e. three right-angled triangles in rational
numbers[5]) which have equal areas. We must first find two numbers such that
their product the sum of their squares a square, e.g. 3, 5, as in the preceding
problem.
9
THE QUADRATURE OF THE CIRCLE, THE SQUARE ROOT OF TWO, AND ...
OF EIGHT-ANGLED TRIANGLES IN NUMBERS, OR RIGHT-ANGLED
TRIANGULAR NUMBERS. Right-angled triangular numbers are rational
numbers so related to each other that the sum of the squares of two of them is
equal to the square ...
WILLIAM ALEXANDER MYERS,
1874
10
The Geometry of the Word Problem for Finitely Generated Groups
subsection we look closely at the geometry of certain kernel subgroups of a
particular family of 3-dimensional right-angled Artin groups. This is our second
family of CAT(0) groups containing subgroups with Dehn functions an arbitrary
degree ...
Noel Brady, Tim Riley, Hamish Short,
2007
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Georgian bars – angularity check without transfer file
The verification of detected grids works in that way, that the LineScanner checks if every single grid is at least parallel or right-angled to one of the outlines of the ... «Glass on Web, 七月 15»
Little House on the Prairial – An Irishman's Diary about revolutionary …
But the classic scythe, with a crooked handle and right-angled blade, was strictly for mowing grass or corn. An Irishman's Diary about Bing Crosby's connections ... «Irish Times, 五月 15»
Ancient Pythagoras theorem can track patient's health
According to the theorem, in a right-angled triangle, the sum of the squares of the two right-angled sides is equal to the square of it's hypotenuse. In other words ... «Bangladesh News 24 hours, 一月 15»
2500-year-old Pythagoras theorem helps to show when a patient …
Pythagoras theorem states that in a right-angled triangle, the sum of the squares of the two right-angled sides is equal to the square of the hypotenuse (i.e the ... «Medical Xpress, 十二月 14»
10 Cities Visualized By How Cleanly Their Streets Are Laid Out
Right-angled streets aligned in cardinal directions are represented in red (streets that go north-south or east-west) and different colors—in a range from purple to ... «Co.Exist, 十一月 14»
Chow pitches right-angled curbs to keep pedestrians safer
The plan would be to turn rounded curbs at the city's 100 most dangerous intersections into sharp right-angled ones so drivers would have to slow down, making ... «680 News, 九月 14»
China gets wooden spoon for right-angled running track
Sports officials in northeast China have claimed the gold medal for incompetence after authorising the construction of a running track with right-angled corners. «Telegraph.co.uk, 七月 14»
Taiwanese man, 54, gets Lego-style flat top haircut to impress 23 …
Wu Lei, 54, reportedly spends up to two hours - and more than two pots of gel - intricately shaping his mop into a perfectly right-angled flat top. He hopes it will ... «New York Daily News, 七月 14»
Olivia Chow aims to end pedestrian deaths in Toronto with plan to …
... with “common sense fixes” such as better lighting, longer signal times, pedestrian safety islands and right-angled curbs that are supposed to slow cars down. «National Post, 五月 14»
How triangles revolutionized mapmaking
Many triangles in real life are not right angled. But this does not limit the use of the equation a² + b² = c² because any triangle can be cut into two right-angled ... «The Week Magazine, 四月 14»